EP1386999B1 - Rohrbündelkonstruktion und verfahren zur herstellung eines strömungsrohrs - Google Patents

Rohrbündelkonstruktion und verfahren zur herstellung eines strömungsrohrs Download PDF

Info

Publication number
EP1386999B1
EP1386999B1 EP02705250A EP02705250A EP1386999B1 EP 1386999 B1 EP1386999 B1 EP 1386999B1 EP 02705250 A EP02705250 A EP 02705250A EP 02705250 A EP02705250 A EP 02705250A EP 1386999 B1 EP1386999 B1 EP 1386999B1
Authority
EP
European Patent Office
Prior art keywords
flow
pipe portion
larger diameter
diameter
tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02705250A
Other languages
English (en)
French (fr)
Other versions
EP1386999A1 (de
EP1386999A4 (de
Inventor
Keiichi Fujiki
Tetsu Makino
Akimine Izawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP1386999A1 publication Critical patent/EP1386999A1/de
Publication of EP1386999A4 publication Critical patent/EP1386999A4/de
Application granted granted Critical
Publication of EP1386999B1 publication Critical patent/EP1386999B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/026—Details of the turbulence section

Definitions

  • the present invention relates to the tube bank structure composing the headbox of a paper-making machine provided with a plurality of flow tubes inside which flows raw material of paper (stock) and a method of manufacturing said flow tubes.
  • a large number of flow tubes which raw material of paper (stock) flows through are arranged in the tube bank of the headbox of a papermaking machine for stabilizing the flow therethrough of stock and conducting it to nozzles provided at downstream portion of the tubes.
  • the stabilized flow of the stock at the outlet of the tube bank is important and a variety of arts are put into practice to improve the stabilizing effect in the tube bank to suppress turbulent flow of the stock at the outlet of the tube bank as the machine becomes increasingly faster.
  • a plurality of flow tubes 2 arranged in the tube bank of the headbox of the papermaking machine are formed such that the inlet side portion of circular cross-section of each flow tube is joined to a larger diameter circular pipe portion of a diameter larger than that of said inlet side portion and the larger diameter circular pipe portion is succeeded by a portion of which the configuration of cross-section is smoothly changed to a rectangular section at the outlet opening end while maintaining the circumferential length constant.
  • a plurality of flow tubes each tube being formed such that the inlet side cross-section is of circular configuration and the configuration of section changes smoothly while increasing in cross-sectional area to a rectangular configuration at the outlet opening end, are arranged such that said outlet opening ends are aligned in staggered arrangement.
  • the flow tube 2 is formed such that the circular inlet side portion is joined to a larger diameter circular pipe portion of a diameter larger than that of said inlet side portion and the larger diameter circular pipe portion is succeeded by a portionof which the configuration of cross-section is smoothly changed to a rectangular section at the outlet opening end and a plurality of the flow tubes are arranged such that the rectangular outlet opening ends are aligned in a vertical direction, so that the center distance between adjacent rectangular outlet opening ends in the vertical direction is defined by the outer diameter of said larger diameter circular pipe portion. Therefore, there is formed between adjacent outlet opening ends a rand S of large width corresponding to the length (diameter of said larger diameter pipe portion - width(shorter side) of the rectangle of outlet opening end + 2 times of wall thickness of the flow tube 2).
  • turbulence of large size is developed immediately downstream relative to the rectangular outlet end parts.
  • a flow seat is provided for stabilizing the flow of stock immediately downstream relative to each rectangular opening end, which results in complicated structure and poor maintainability because of the necessity of removing the flow seat when performing maintenance servicing.
  • each of the flow tubes is formed such that it is increased in diameter from the inlet opening end toward the outlet opening end and the inlet end of each of the inlet opening end is welded to a plate while aligning a plurality of the flow tubes, so the manufacturing cost of the flow tube bank is increased.
  • the length of the flow tube is formed to be very long, which may induce to the development of concentration streak after the stock flow outflows the flow tube.
  • the rectangular outlet openings of a plurality of said flow tubes are aligned in staggered arrangement. Therefore, flow tubes different in shape and cross-sectional area are to be located in both ends in the direction of width of the tube arrangement. As a result, dispersion and flow rate in the center part are different from those in the both end parts of the flow passage.
  • DE 35 25 760 A1 describes a headbox tube bank apparatus for permitting the flow of stock in a papermaking machine comprising two mounting plates each having a plurality of holes, wherein each pair of corresponding holes is connected by a sleeve having a downstream end protruding through the upper mounting plate. Each of the protruding ends of the sleeve is provided with an attachment having a square or rectangular orifice in the downstream side in the direction of the paper stock flow.
  • DE 199 37 302 A1 describes stock inlet of a papermaking machine with at least one turbulence insert with a plurality of pulp carrying channels having hydraulic diameters that expand from a preceding hydraulic diameter to a subsequent hydraulic diameter.
  • the present invention was made in light of the problems in prior arts, the object is to provide a tube bank structure in which stabilization of the flow of stock in the tube bank is improved by a simple and inexpensive means and the development of turbulence and uneven concentration of stock flow is prevented, resulting in speedup of the papermaking machine, and a method of manufacturing the flow tube thereof.
  • the present invention proposes as set forth in claim 1 the tube bank structure of the headbox of a papermaking machine having a plurality of flow tubes for flowing raw material of paper (stock) arranged in the tube bank, wherein each of said flow tubes has a smaller diameter pipe portion of a circular cross-sectional configuration in the upstream side defining an inlet opening for the stock, and a larger diameter flow tube portion, the larger diameter flow tube portion consisting of a larger diameter pipe portion of a diameter larger than that of said smaller diameter pipe portion and connected to said smaller diameter pipe portion, a succeeding tapered pipe portion changing smoothly in sectional configuration from circular one to rectangular one toward downstream to be enlarged smoothly in cross-sectional area to be succeeded by a rectangular pipe portion defining an outlet opening for the stock.
  • each of said flow tube such that the larger diameter flow tube portions is formed such that the upstream side end of the tapered pipe has a circular cross-section of the diameter the same as that of said larger diameter pipe portion and its downstream side end has a rectangular cross-section the same as that of said rectangular pipe portion, and further shorter sides, i.e. width (B 1 ) of said rectangular pipe portion is larger than the outer diameter (D 1 ) of said larger diameter pipe portion.
  • Each of said larger diameter flow tube portions is shaped from a single seamless pipe.
  • a plurality of said flow tubes are arranged in said tube bank such that the outlet opening ends are arranged like in an array of cells so as not to form a gap between adjacent opening ends in a vertical direction.
  • a plurality of said flow tubes are arranged in said tube bank such that the outlet opening ends are arranged like in an array of cells so as not to form a gap between adjacent opening ends in a horizontal direction.
  • a plurality of said flow tubes are arranged in said tube bank such that the outlet opening ends are arranged like in an array of cells so as not to form a gap between adj acent opening ends in a horizontal direction, in a vertical direction a dove-tail plate is located in each gap between adjacent outlet opening ends, and a flow seat is possible to be anchored to the dove-tail plate to be extended downstream therefrom.
  • each of said flow tubes is directly opened toward downstream passage defining a nozzle part without the medium of a flow seat.
  • the method of manufacturing a flow tube for flowing raw material of paper (stock), a plurality of said flow tubes being to be arranged in the tube bank of the headbox of a papermaking machine, each of said flow tubes having a smaller diameter pipe portion of a circular cross-section in the upstream side and a larger diameter flow tube portion extending downstream therefrom consisting of a larger diameter pipe portion, a tapered pipe portion, and a rectangular pipe portion, is characterized by the features of the characterizing portion of claim 8.
  • said semi-processed pipe is formed by expanding a single circular pipe of the diameter corresponding to that of the larger diameter pipe portion to have said circular pipe diameter portion, an expanding tapered portion, and an expanded diameter portion in continuity, or by rotary swaging a single circular pipe of the diameter corresponding to that of the expanded diameter portion to have the expanded diameter portion, the tapered portion, and the larger diameter portion corresponding to the larger diameter pipe portion in continuity.
  • the flow of the stock changed in flow direction by about 90° when it is introduced into the smaller diameter pipe portion becomes symmetric in velocity distribution with respect to the center line of the flow tube during it flows in the smaller diameter pipe portion.
  • the flow is disturbed when it passes the stepped part at the connecting part of the smaller diameter pipe portion with the larger diameter pipe portion, where the dispersion of fibers is improved by the disturbance.
  • the flow of the stock is stabilized as it flows through the larger diameter pipe section and through the tapered pipe portion where the flow passage is formed so that flow separation does not occur.
  • the flow tubes are arranged such that the outlet end of each rectangular pipe portion is arranged like in an array of cells in a vertical and horizontal directions without forming a gap between each flow tube as described above, the width of the rand between each opening end is minimum as is only two times the thickness of the tube wall. Therefore, the turbulence in the flow of the stock at the outlet openings is largely suppressed compared with the case of the conventional art in which a gap between the adjacent outlet openings of rectangular pipe portions is formed.
  • the outlet ends of said flow tubes like in an array of cells, the outlet ends of the same configuration are located all over the width of the outlet of the tube bank, so the flow of the stock with uniform dispersion of fibers all over the flow passage downstream from the outlet can be achieved.
  • a flow seat is not required to be provided immediately downstream relative to each outlet opening end of rectangular configuration for stabilizing the flow as is in the case of said prior art, resulting in simplified construction and improved maintainability of the papermaking machine due to the elimination of said flow seat.
  • a single pipe is formed into a semi-processed pipe having a larger diameter portion, an expanding tapered portion, and an expanded diameter portion, and then the larger diameter flow tube portion with cross-sectional configuration smoothly changing from the circular configuration in the inlet side toward the rectangular configuration in the outlet side can be obtained only by pressing the linearly expanded tapered portion and the expanded diameter portion in a radial direction. Therefore, the larger diameter flow tube portion can be manufactured easily without welding process as was in the case of a conventional art, resulting in the reduction of the number of manufacturing hours.
  • FIG.1 is an illustration showing the structure of a flow tube attached to the tube bank of the headbox of the papermaking machine according to the present invention
  • FIG. 1(A) is a front view
  • FIG.1(B) is a view in the direction of arrow A in FIG. 1(A).
  • FIG.2 is an illustration for explaining the method of manufacturing said flow tube.
  • FIG.3 is a schematic sectional view near the tube bank of the headbox
  • FIG.4 is a view in the direction of arrows B-B in FIG.3.
  • FIG.5 is an enlarged partial cutaway view of the encircled part Z in FIG.3 in the case of a second embodiment
  • FIG.6 is a view in the direction of arrows C-C in FIG.5.
  • reference numeral 1 is a tube bank
  • 3 is a tapered pipe-like header connected to said tube bank at upstream side
  • 7 is a tube inlet passage for allowing raw material of paper (stock) to flow into said tube bank
  • 4 is a tube bank casing.
  • Reference numeral 2 indicates a plurality of flow tubes arranged in said tube bank casing 4 and will be detailed later.
  • Reference numeral 5 is a nozzle part connected to the outlet passage 10 of the tube bank 1.
  • Said plurality of flow tubes 2 are arranged in the casing 4 of the tube bank 1 such that the outlet opening ends 25 are arranged like in an array of cells without forming a gap between each of the flow tubes 2 in both vertical and horizontal directions as shown in FIG.4.
  • the outlet passage 10 of said tube bank 1 is, as shown in FIG.3, opened directly to the downstream passage including saidnozzle part 5 without a medium for flow stabilization such as flow seats, etc.
  • the flow tube 2 consists of a smaller diameter pipe portion 210 of length L 0 being circular in sectional configuration and defining an inlet opening 24 for introducing the stock, a larger diameter portion 21 of length L 1 larger in diameter than said smaller diameter pipe portion 210 connected therewith, a rectangular pipe portion 23 of length L 3 being rectangular in sectional configuration and defining the outlet opening 25, and a tapered pipe portion 22 of length L 2 of which the portion is expanded in the downstream direction to be connected with said larger diameter pipe portion 21 and said rectangular pipe portion 23, the larger diameter pipe portion 21, tapered pipe portion 22, and rectangular pipe portion 23 being denoted together as a larger diameter flow tube portion 121.
  • the larger diameter flow tube portion 121 is shaped from a single seamless pipe made of a corrosion-resistant material such as stainless steel pipe. At the connection of said smaller diameter pipe portion 210 with said larger diameter pipe portion 21 is formed a stepped part. Reference number 9 is a flow passage formed inside the flow tube 2.
  • the upstream end of said tapered pipe portion 22 is formed in a circular configuration of a diameter same as that of said larger diameter pipe portion 21 to be connected smoothly therewith, and the downstream end thereof is formed in a rectangular configuration same as that of said rectangular pipe portion 23 to be connected smoothly therewith.
  • the shorter side B 1 of said rectangular pipe portion 23, the outer diameter D 1 of said larger diameter pipe portion 21, and the height (vertical width in the drawing) of said tapered pipe portion 22 are about the same, and the tapered pipe portion 22 is expanded in a horizontal direction. More specifically, the shorter side B 1 of said rectangular pipe portion 23 is formed a little larger than the outer diameter D 1 of said larger diameter pipe portion 21.
  • the flow of the stock is sufficiently stabilized in each of the flow tubes 2, and unevenness in the concentration of the stock does not occur in the flow after the flow tube 2 due to proper turbulence.
  • a pipe of diameter which is the same as that of said larger diameter pipe portion 21 is formed into a semi-processed pipe 0021 of larger diameter flow tube portion having a larger diameter portion of length L 1 , an expanding tapered portion 022 of length L 2 expanded in diameter along the length L 2 which corresponds to said tapered pipe portion 22, and an expanded diameter portion 023 of length L 3 which corresponds to said rectangular pipe portion 23 by expanding the diameter according to each portion.
  • the semi-processed pipe 0021 is pressed to change sectional configuration such that the expanding tapered portion 022 is deformed from immediately downstream part of the larger diameter portion 021 along the length L 2 to smoothly change the shape of section from a circular configuration which is the same as that of the larger diameter pipe portion 21 into the rectangular configuration which is the same as that of the rectangular pipe portion 23 and to change the expanded portion 023 from a circular sectional configuration into a rectangular sectional configuration which is the same as that of the rectangular pipe portion 23.
  • the smaller diameter portion 0210 of length L 0 corresponding to said smaller diameter pipe portion 210 is welded to the larger diameter portion 021.
  • a single pipe is formed into the semi-processed pipe 0021 of larger diameter flow tube portion having a larger diameterportion 021 corresponding to the larger diameter pipe portion 21, a linearly expanded tapered portion 022 corresponding to the tapered pipe portion 22, and an expanded diameter portion 023 corresponding to the rectangular pipe portion 23 by expanding the diameter in accordance with each portion, then the larger diameter flow tube portion 121 can be obtained only by pressing the expanding tapered portion 022 and the expanded diameter portion 023 in a radial direction. Therefore, the larger diameter flow tube portion 121 can be manufactured easily without welding process resulting in the reduction of the number of manufacturing hours.
  • the stock introduced into said tube bank 1 via said header 3 and inlet passage 7 enters the smaller diameter pipe portion 210 of each flow tube 2 as shown in FIG.3.
  • the flow of the stock changed in direction by about 90° when it is introduced to the inlet passage 7 to flow through the smaller diameter pipe portion 210 is perfectly directed in the machine direction during it flows in the pipe portion 210 and the flow velocity distribution in the pipe portion 210 becomes symmetric with respect to the center line of the flow tube.
  • the flow is disturbed at the stepped part where the cross-sectional area abruptly changes from that of the smaller diameter pipe portion 210 to that of the larger diameter pipe portion 21, stress loss is induced, the flocculation of fibers is destroyed, and dispersion of fibers is improved.
  • the turbulence induced at said stepped part is lowered, i.e. the flow is stabilized.
  • the lengths L 1 , L 2 , and L 3 are too long, the flow becomes excessively stabilized and uneven fiber concentration is produced in the tube resulting in the development of concentration streaks even after the stock flowed out from the flow tube 2.
  • the length of the larger diameter flow tube portion 121 determines the length of the larger diameter flow tube portion 121 to be long enough for stabilizing the turbulence induced at the stepped part and at the same time to be of the length with which the concentration streaks does not develop in the downstream flow, that is, to be in the range determined by the equation (1), the flow is stabilized and the development of concentration streaks in the downstream flow is prevented.
  • a plurality of the flow tubes 2 arranged in the casing 4 of the tube bank 1 are arranged such that the outlet opening ends 25 of the rectangular pipe portions 23 are arranged like in an array of cells without forming a gap between each of the flow tubes in both vertical and horizontal directions as shown in FIG.4, so that the width of the rand 8 at the outlet opening end 25 is only two times the thickness of the flow tube 2. Therefore, the turbulence of the flow of stock at the outlet of the flow tube 2 is largely decreased compared with the case of the invention of Japanese patent Publication 6-506274, in which there is a clearance between adjacent outlet opening ends of rectangular configuration.
  • a flow seat is not required to be provided immediately downstream relative to each outlet opening end of rectangular configuration for stabilizing the flow as is in the case of said prior art, resulting in simplified construction and improved maintainability of the papermaking machine due to the elimination of said flow seat.
  • a plurality of said flow tubes 2 are arranged such that the outlet opening ends 25 of the rectangular pipe portions 23 are arranged like in an array of cells without forming a gap between each of the flow tubes in a horizontal direction and a dove-tail plate 30 is provided in the clearance formed between adjacent outlet opening ends 25 in a vertical direction, a flow seat 31 being possible to be anchored to the dove-tail plate 30 to be extended downstream therefrom.
  • the dove-tail plate 30 to anchor the flow seat 31 in the clearance formed as small as possible between each opening end 25 of each flow tube 2 in a vertical direction, it is possible to comply with the property peculiar to the kind of paper to be made, for example, with low value of the ratio of tensile strength in the flow direction to that in the direction perpendicular thereto (in width direction), etc.
  • the flow of the stock changed in flow direction by about 90° when it is introduced to the smaller diameter pipe portion 210 is perfectly directed in the machine direction during it flows in the pipe portion 210 and the flow velocity distribution in the pipe portion 210 becomes symmetric with respect to the center line of the flow tube.
  • the flow is disturbed when it passes the stepped part at the connecting part of the smaller diameter pipe portion with the larger diameter pipe portion, where the dispersion of fibers is improved by the disturbance.
  • the flow of the stock is stabilized as it flows through the tapered pipe portion where the flow passage is formed so that flow separation does not occur and through the rectangular pipe portion.
  • outlet ends of the same configuration are located all over the width of the tube bank by the arrangement of the outlet ends of the flow tubes like in an array of cells, so the flow of the stock with uniform dispersion of fibers all over the width of the flow passage downstream from the outlet can be achieved.
  • the flow tubes are arranged such that the outlet ends of rectangular pipe portions are arranged like in an array of cells in a vertical and horizontal directions without forming a gap between adjacent opening ends, the width of the rand between adjacent opening ends is minimum as is only two times the thickness of the tube wall. Therefore, the turbulence in the flow of the stock at the outlet openings is largely suppressed compared with the case of the conventional art in which a clearance is formed between adjacent outlet openings of rectangular pipe portions.
  • a flow seat is not required to be provided immediately downstream relative to each outlet opening end of rectangular configuration for stabilizing the flow as is in the case of said prior art, resulting in simplified construction and improved maintainability of the papermaking machine due to the elimination of said flow seat.
  • the dove-tail plate to anchor the flow seat in the clearance formed as small as possible between adjacent opening ends of flow tubes in a vertical direction.
  • a single pipe is formed into a semi-processed pipe having a larger diameter portion, an expanding tapered portion, and an expanded diameter portion, and then the larger diameter flow tube portion having a tapered pipe portion with cross-sectional configuration smoothly changing from the circular configuration in the inlet side to the rectangular configuration in the outlet side can be obtained only by pressing the expanding tapered portion and the expanded diameter portion in a radial direction. Therefore, the larger diameter flow tube portion can be manufactured easily without welding process resulting in the reduction of the number of manufacturing hours.
  • the stabilization of the flow of stock in the tube bank is improved by a simple and inexpensive means, and the development of turbulence and uneven concentration of stock flow is prevented, resulting in speedup of papermaking process.

Landscapes

  • Paper (AREA)

Claims (9)

  1. Rohrpacket (1) -Aufbau des Stofflaufkastens einer Papierherstellungsmaschine, der eine Vielzahl von Strömungsrohren (2) zum Strömen von Rohmaterial des Rohpapiers aufweist, die in dem Rohrpacket (1) angeordnet sind, wobei jedes der Strömungsrohre (2) einen Anschlussrohrabschnitt (210) mit kleinerem Durchmesser einer kleineren Querschnitts-Konfiguration an der stromaufwärtigen Seite aufweist, der eine Einlassöffnung (24) für das Rohpapier definiert, sowie einen Strömungsrohrabschnitt mit größerem Durchmesser (121), wobei der Strömungsrohrabschnitt (121) mit größerem Durchmesser aus einem Anschlussrohrabschnitt (21) mit größerem Durchmesser mit einem Durchmesser besteht, der größer als der des Rohranschlussabschnitts (210) mit kleinerem Durchmesser ist und mit dem Rohranschlussabschnitt (210) mit kleinerem Durchmesser verbunden ist, einen nachgeschalteten konisch zulaufenden Anschlussrohrabschnitt (22), dessen Schnitt-Konfiguration sich sanft von kreisförmig auf rechteckig stromabwärts hin verändert, um sanft im Querschnittsbereich vergrößert zu werden, um einen nachgeschalteten rechteckigen Anschlussrohrabschnitt (23) aufzuweisen, der eine Auslassöffnung (25) für das Rohpapier definiert, dadurch gekennzeichnet, dass
    die Länge (L1) des Abschnitts (21) mit größerem Durchmesser, die Länge (L2) des konisch zulaufenden Anschlussrohrabschnitts (22) und die Länge (L3) des rechteckigen Anschlussrohrabschnitts (23) die folgende Formel erfüllen: L 1 + L 2 + L 3 = ( 3.5 ∼ 7 ) × D 2
    Figure imgb0004
    in Bezug auf den inneren Durchmesser (D2) des Anschlussrohrabschnitts (21) mit größerem Durchmesser.
  2. Rohrpacket (1) -Aufbau gemäß Anspruch 1, wobei jeder der Strömungsrohrabschnitte (121) mit größerem Durchmesser derart ausgebildet ist, dass das stromaufwärtige Seitenende des konisch zulaufenden Rohrs (22) einen kreisförmigen Querschnitt mit einem Durchmesser aufweist, der der gleiche ist wie der des Anschlussrohrabschnitts (21) mit größerem Durchmesser, und dass dessen stromabwärtiges Seitenende einen rechteckigen Querschnitt aufweist, der gleich ist zudem des rechteckigen Anschlussrohrabschnitts (23), und wobei die kürzeren Seiten, d.h. die Breite (Bi) des rechteckigen Rohranschlussabschnitts (23) größer als der äußere Durchmesser (D1) des Rohrabschnitts (21) mit größerem Durchmesser ist.
  3. Rohrpacket (1) -Aufbau gemäß Anspruch 1,
    wobei jeder der Strömungsrohrabschnitte (2) mit größerem Durchmesser aus einem einzelnen nahtlosen Rohr geformt ist.
  4. Rohrpacket (1) -Aufbau gemäß Anspruch 1,
    wobei eine Vielzahl der Strömungsrohre (2) in dem Rohrpacket (1) derart angeordnet ist, dass die Auslassöffnungs(25)-Enden wie eine Reihe von Zellen angeordnet ist, um so einen Spalt zwischen benachbarten Öffnungsenden in einer vertikalen Richtung auszubilden.
  5. Rohrpacket (1) -Aufbau gemäß Anspruch 1,
    wobei eine Vielzahl der Strömungsrohre (2) in dem Rohrpacket (1) derart angeordnet ist, dass die Auslassöffungs (25)-Enden wie eine Reihe von Zellen derart angeordnet sind, dass sie einen Spalt zwischen benachbarten Öffnungsenden in einer horizontalen Richtung ausbilden.
  6. Rohrpacket (1) -Aufbau gemäß Anspruch 1,
    wobei das Auslassöffnungs(25)-Ende jedes der Strömungsrohre (2) direkt auf den stromabwärtigen Durchgang geöffnet ist, der einen Düsenteil (5) ohne das Medium eines Strömungssitzes definiert.
  7. Rohrpacket (1) -Aufbau gemäß Anspruch 1,
    wobei eine Vielzahl der Strömungsrohre (2) in dem Rohrpacket (1) derart angeordnet ist, dass die Auslassöffnungs(25)-Enden wie eine Reihe von Zellen so angeordnet sind, dass sie einen Spalt zwischen benachbarten Öffnungsenden in einer horizontalen Richtung und in einer vertikalen Richtung ausbilden, und wobei eine Taubenschwanz-Platte in jedem Spalt zwischen benachbarten Auslassöffnungs(25)-Enden platziert ist und ein Strömungssitz optional so an der Taubenschwanz-Platte verankert ist, dass er sich hiervon stromabwärts erstreckt.
  8. Herstellungsverfahren für ein Strömungsrohr zum Hindurchströmen von Rohmaterial aus Rohpapier, wobei eine Vielzahl der Strömungsrohre (2) in dem Rohrpacket (1) des Stofflaufkastens einer Papierherstellungsmaschine angeordnet ist und wobei jedes der Strömungsrohre (2) einen Rohranschlussabschnitt (210) mit kleinerem Durchmesser mit kreisförmigem Querschnitt an der stromaufwärtigen Seite sowie einen Strömungsrohrabschnitt mit größerem Durchmesser (121) aufweist, der sich hiervon stromabwärts erstreckt und aus einem Rohranschlussabschnitt (21) mit größerem Durchmesser, einem konisch zulaufenden Rohranschlussabschnitt (22) und einem rechteckigen Rohranschlussabschnitt (23) besteht, wobei der Strömungsrohrabschnitt (121) mit größerem Durchmesser durch Ausbilden eines einzelnen Rohranschlusses in einen halb bearbeiteten Rohranschluss (0021) geformt ist, der einen Abschnitt mit größerem Durchmesser aufweist, der mit dem Rohranschlussabschnitt (21) mit größerem Durchmesser korrespondiert, einen sich erweiternden konisch verlaufenden Abschnitt (022) sowie einen Abschnitt (23) mit sich erweiterndem Durchmesser in Reihe, und anschließendes Verpressen des sich erweiternden konisch verlaufenden Abschnitts (022) und des Abschnitts (023) mit sich erweiterndem Durchmesser in radialer Richtung, um den sich erweiternden konisch verlaufenden Abschnitt (022) in den konisch zulaufenden Rohranschlussabschnitt (22) auszuformen und die Querschnitts-Konfiguration sanft von kreisrund auf rechteckig und den Abschnitt (023) mit sich erweiterndem Durchmesser in den rechteckigen Rohranschlussabschnitt (23) zu verändern, dadurch gekennzeichnet, dass
    die Länge (L1) des Abschnitts (21) mit größerem Durchmesser, die Länge (L2) des konisch zulaufenden Rohranschlussabschnitts (22) sowie die Länge (L3) des rechteckigen Rohranschlussabschnitts (23) in Bezug auf den inneren Durchmesser (D2) des Rohranschlussabschnitts (21) mit größerem Durchmesser wie folgt bestimmt sind: L 1 + L 2 + L 3 = ( 3.5 ∼ 7 ) × D 2 .
    Figure imgb0005
  9. Herstellungsverfahren für ein Strömungsrohr gemäß Anspruch 8, wobei der halb bearbeitete Rohranschluss (0021) durch Expandieren eines einzelnen kreisförmigen Rohranschlusses mit einem Durchmesser, der mit dem des Rohranschlussabschnitts (21) mit größerem Durchmesser korrespondiert, ausgebildet wird, um den kreisförmigen Rohranschluss-Durchmesserabschnitt, einen sich erweiternden konisch verlaufenden Abschnitt (022) sowie einen Abschnitt (023) mit sich erweiterndem Durchmesser in Reihe zu erhalten, oder durch Rundkneten eines einzelnen kreisförmigen Rohranschlusses mit einem Durchmesser, der mit dem des Abschnitts (023) mit sich erweiterndem Durchmesser korrespondiert, um den Abschnitt (023) mit sich erweiterndem Durchmesser, den konisch zulaufenden Abschnitt (22) und dem Abschnitt mit größerem Durchmesser, der mit dem Rohranschlussabschnitt (21) mit größerem Durchmesser korrespondiert, in Reihe zu erhalten.
EP02705250A 2001-03-19 2002-03-15 Rohrbündelkonstruktion und verfahren zur herstellung eines strömungsrohrs Expired - Lifetime EP1386999B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2001078374A JP3530499B2 (ja) 2001-03-19 2001-03-19 チューブバンク構造及びフローチューブの製造方法
JP2001078374 2001-03-19
PCT/JP2002/002492 WO2002077363A1 (fr) 2001-03-19 2002-03-15 Structure de faisceau de tubes et procede de fabrication de tubes d'ecoulement

Publications (3)

Publication Number Publication Date
EP1386999A1 EP1386999A1 (de) 2004-02-04
EP1386999A4 EP1386999A4 (de) 2004-06-09
EP1386999B1 true EP1386999B1 (de) 2007-01-10

Family

ID=18934998

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02705250A Expired - Lifetime EP1386999B1 (de) 2001-03-19 2002-03-15 Rohrbündelkonstruktion und verfahren zur herstellung eines strömungsrohrs

Country Status (6)

Country Link
US (1) US6902651B2 (de)
EP (1) EP1386999B1 (de)
JP (1) JP3530499B2 (de)
CN (1) CN1205384C (de)
DE (1) DE60217475T2 (de)
WO (1) WO2002077363A1 (de)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040250404A1 (en) * 2003-01-14 2004-12-16 Cripsey Timothy J. Process for press forming metal tubes
DE102005008269A1 (de) * 2005-02-22 2006-08-24 Voith Paper Patent Gmbh Turbulenzerzeuger für einen Stoffauflauf
WO2007049528A1 (ja) * 2005-10-25 2007-05-03 Sumitomo Seika Chemicals Co., Ltd. 抄紙方法および抄紙システム
US8075737B2 (en) * 2006-01-30 2011-12-13 Paperchine Inc. Headbox apparatus for a papermaking machine
US7794570B2 (en) * 2006-01-30 2010-09-14 Paperchine Inc. Headbox apparatus for a papermaking machine
US7897016B2 (en) * 2006-01-30 2011-03-01 James Leroy Ewald Headbox apparatus for a papermaking machine
CA2641256C (en) * 2006-02-01 2010-09-28 Astenjohnson, Inc. Headbox and stock delivery system for a papermaking machine
US8795473B2 (en) * 2007-12-11 2014-08-05 Paperchine Inc. Tube bank apparatus for distributing stock
US7955474B2 (en) * 2007-12-11 2011-06-07 Paperchine Inc. Tube bank apparatus for distributing stock
JP2010196239A (ja) * 2009-02-24 2010-09-09 Paperchine Inc ストックを分配する管バンク装置
FI122600B (fi) * 2009-03-27 2012-04-13 Metso Paper Inc Virtausputki kuiturainakoneen perälaatikon turbulenssigeneraattoria varten ja menetelmä virtausputken valmistamiseksi kuiturainakoneen perälaatikon turbulenssigeneraattoria varten sekä kuiturainakoneen perälaatikon turbulenssigeneraattori
DE102009028389A1 (de) * 2009-08-10 2011-02-17 Voith Patent Gmbh Stoffauflauf, Blattbildungseinheit mit einem Stoffauflauf und Verfahren zum Betreiben einer Blattbildungseinheit
DE102009028385A1 (de) * 2009-08-10 2011-02-17 Voith Patent Gmbh Verfahren zum Betreiben einer Blattbildungseinheit und Blattbildungseinheit
DE102010001614A1 (de) * 2010-02-05 2011-08-11 Voith Patent GmbH, 89522 Stoffauflauf und Blattbildungseinheit mit einem Stoffauflauf
US9422665B2 (en) 2012-09-04 2016-08-23 Paperchine Inc. Headbox apparatus
CN104343037A (zh) * 2014-11-17 2015-02-11 张珣 有源喷浆机
CN109706775B (zh) * 2019-03-15 2020-12-01 河南江河纸业股份有限公司 一种湍流发生器圆变方渐变管及其制备方法和设备
MX2022014704A (es) * 2020-05-29 2023-01-30 Kimberly Clark Co Caja de entrada para fabricar un sustrato.

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3400044A (en) * 1965-05-27 1968-09-03 Beloit Corp Headbox flow control apparatus
US3514372A (en) 1966-11-29 1970-05-26 Beloit Corp Headbox method and means for blending of multiple jets
US3652392A (en) * 1969-11-24 1972-03-28 Kimberly Clark Co Contracting pre-slice flow distributor for papermaking machine headbox
CH608050A5 (de) * 1976-02-25 1978-12-15 Escher Wyss Gmbh
CA1134188A (en) * 1980-04-03 1982-10-26 Denis Croteau Stock supply system for paper machine
DE8520836U1 (de) 1984-08-22 1986-01-02 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Führungsteil für den Stoffauflauf einer Papiermaschine
US5183537A (en) * 1991-10-07 1993-02-02 Beloit Technologies, Inc. Headbox tube bank apparatus and method of directing flow therethrough
US5196091A (en) * 1991-10-29 1993-03-23 Beloit Technologies, Inc. Headbox apparatus with stock dilution conduits for basis weight control
DE19937302A1 (de) 1999-08-10 2001-02-15 Voith Paper Patent Gmbh Stoffauflauf

Also Published As

Publication number Publication date
CN1205384C (zh) 2005-06-08
US6902651B2 (en) 2005-06-07
WO2002077363A1 (fr) 2002-10-03
US20030178167A1 (en) 2003-09-25
EP1386999A1 (de) 2004-02-04
EP1386999A4 (de) 2004-06-09
DE60217475T2 (de) 2007-10-11
CN1461368A (zh) 2003-12-10
JP3530499B2 (ja) 2004-05-24
JP2002275778A (ja) 2002-09-25
DE60217475D1 (de) 2007-02-22

Similar Documents

Publication Publication Date Title
EP1386999B1 (de) Rohrbündelkonstruktion und verfahren zur herstellung eines strömungsrohrs
JP2794057B2 (ja) ヘッドボックスの管列装置
EP0819191B1 (de) System zum einspritzen von zusatzstoffen in den auflaufkasten
EP2379800B1 (de) Stoffauflauf für eine maschine zur herstellung der faserstoffbahn
US8303774B2 (en) Headbox for a machine for producing a fibrous web
CA1271354A (en) Headbox for paper machine
US20120168105A1 (en) Headbox for a machine for producing a fibrous web
DE102008054893A1 (de) Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn
CA1204614A (en) Flow rectifier
DE102009028389A1 (de) Stoffauflauf, Blattbildungseinheit mit einem Stoffauflauf und Verfahren zum Betreiben einer Blattbildungseinheit
JPH04241186A (ja) 製紙機械用ヘッドボックス
US4897160A (en) Head box for a paper making machine
CA1167308A (en) Method and an apparatus for the feeding of a fibre suspension onto the wire of a web former
DE102009028385A1 (de) Verfahren zum Betreiben einer Blattbildungseinheit und Blattbildungseinheit
EP2487292A1 (de) Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn
EP2585633B1 (de) Stoffauflauf für eine maschine zur herstellung einer faserstoffbahn
US7001488B2 (en) Method of and apparatus for distribution of paper stock in paper or board making machinery
DE102018120162A1 (de) Stoffauflauf
KR100467358B1 (ko) 지료를제지기의헤드박스로공급하는장치
FI84736B (fi) Turbulensgenerator i inloppslaodan av en pappersmaskin.
DE102005027354A1 (de) Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn, insbesondere einer Papier- oder Kartonbahn
JP2727668B2 (ja) 抄紙機のヘッドボックス
DE1561650B (de) Stoffauflauf für eine Papiermaschine
EP1659210A1 (de) Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn, insbesondere einer Papier- oder Kartonbahn
WO1999011859A1 (en) An apparatus for increasing internal bond strength of a web

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20021115

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

A4 Supplementary search report drawn up and despatched

Effective date: 20040422

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RBV Designated contracting states (corrected)

Designated state(s): DE FI

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FI

RIN1 Information on inventor provided before grant (corrected)

Inventor name: IZAWA,AKIMINE

Inventor name: MAKINO,TETSU

Inventor name: FUJIKI,KEIICHI

REF Corresponds to:

Ref document number: 60217475

Country of ref document: DE

Date of ref document: 20070222

Kind code of ref document: P

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20071011

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FI

Payment date: 20210322

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20210319

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 60217475

Country of ref document: DE

REG Reference to a national code

Ref country code: FI

Ref legal event code: MAE